From 12db9e651db011fd78eab2d98bd25d18b297b98f Mon Sep 17 00:00:00 2001
From: Chris Cannam <cannam@all-day-breakfast.com>
Date: Thu, 22 Feb 2018 17:13:58 +0000
Subject: [PATCH] Enable denormal flush-to-zero for ARM64 iOS (previous logic
 only worked for ARM32)

---
 src/system/sysutils.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/system/sysutils.cpp b/src/system/sysutils.cpp
index 4e3f3f2..b4395dc 100644
--- a/src/system/sysutils.cpp
+++ b/src/system/sysutils.cpp
@@ -182,9 +182,12 @@ void system_specific_initialise()
 #elif defined HAVE_VDSP
 #if defined __i386__ || defined __x86_64__ 
     fesetenv(FE_DFL_DISABLE_SSE_DENORMS_ENV);
+#elif defined __arm64__
+    fesetenv(FE_DFL_DISABLE_DENORMS_ENV);
 #endif
 #endif
 #if defined __ARMEL__
+    // ARM32
     static const unsigned int x = 0x04086060;
     static const unsigned int y = 0x03000000;
     int r;